Canon is releasing two new TS lenses, 17 and 24mm. Tilt and shift are independent. I am really going to be interested in the optics of these two new lenses.
http://www.dpreview.com/news/0902/09021806canon17mm24mmTSElenses.asp
http://www.dpreview.com/news/0902/09021806canon17mm24mmTSElenses.asp